19772870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{389}}^1$

素因数の和:449

約数の個数: 64

約数和(自身を含む): 42456960

約数和(自身を除く): 22684090

約数列:

[1, 2, 5, 10, 13, 17, 23, 26, 34, 46, 65, 85, 115, 130, 170, 221, 230, 299, 389, 391, 442, 598, 778, 782, 1105, 1495, 1945, 1955, 2210, 2990, 3890, 3910, 5057, 5083, 6613, 8947, 10114, 10166, 13226, 17894, 25285, 25415, 33065, 44735, 50570, 50830, 66130, 85969, 89470, 116311, 152099, 171938, 232622, 304198, 429845, 581555, 760495, 859690, 1163110, 1520990, 1977287, 3954574, 9886435, 19772870]

約数ペア:

[(1, 19772870), (2, 9886435), (5, 3954574), (10, 1977287), (13, 1520990), (17, 1163110), (23, 859690), (26, 760495), (34, 581555), (46, 429845), (65, 304198), (85, 232622), (115, 171938), (130, 152099), (170, 116311), (221, 89470), (230, 85969), (299, 66130), (389, 50830), (391, 50570), (442, 44735), (598, 33065), (778, 25415), (782, 25285), (1105, 17894), (1495, 13226), (1945, 10166), (1955, 10114), (2210, 8947), (2990, 6613), (3890, 5083), (3910, 5057)]